Deleted email history in Windows Live

Accidentally deleted email history.
I started WIndows Live Mail for my wife which worked fine. I then tried logging on with my own Windows Live ID and saw the same email history. Thinking that this was duplicate file I deleted my wife's email address and found that I had deleted all her email history by mistake!
I there any way I can get the history back? Is it still stored somewhere in the great upstairs or have I lost it forever (divorce pending)?
I'm using Windows 7, Google Chrome and a talktalk address.